<abstract xmlns="http://www.w3.org/1999/xhtml">The aim of this study was to determine the percentage of hatched and fertilized eggs in female Hermann’s tortoises before and after the removal of males after breeding.A breeding group of <italic>Testudo hermanni boettgeri</italic> with 50 females and 12 males was included in the study. In the first year, all adults were together in the same habitat until reproductive activity was observed. After the end of May, the males and females were separated for the next two active seasons. The number of eggs and number of second clutches decreased gradually. In the first year, 76.0% of females laid eggs; in the second year, 24.0%; and in the third year, only 8.0%. Second clutches were observed in ten females (26.3%) in the first year, while in the next two years, one female had a second clutch. There was a small but significant correlation between the weight of a single tortoise and the number of eggs laid but no significant correlation between the weight of the tortoise and its average egg weight. The weight (15.1-16.8 g), length (33.9-36.1 mm) and width of each egg (27.5-28.0 mm) was measured.During the laying season, the eggs were put into incubators. The incubation length varied from 52 to 70 days. After the end of incubation, eggshell mortality and its causes (19.3-52.5%) were examined. In the first year, the viability rate of the incubated eggs was 80.7%; in the second year, 80.5%; and in the third year, 47.8%. Among the unhatched eggs in the first year, 62.5% were unfertilized, 53.1% were infected, 28.1% were dehydrated and 21.9% were found in various stages of embryonic development.</abstract>

The aim of this study was to determine the percentage of hatched and fertilized eggs in female Hermann’s tortoises before and after the removal of males after breeding.A breeding group of Testudo hermanni boettgeri with 50 females and 12 males was included in the study. In the first year, all adults were together in the same habitat until reproductive activity was observed. After the end of May, the males and females were separated for the next two active seasons. The number of eggs and number of second clutches decreased gradually. In the first year, 76.0% of females laid eggs; in the second year, 24.0%; and in the third year, only 8.0%. Second clutches were observed in ten females (26.3%) in the first year, while in the next two years, one female had a second clutch. There was a small but significant correlation between the weight of a single tortoise and the number of eggs laid but no significant correlation between the weight of the tortoise and its average egg weight. The weight (15.1-16.8 g), length (33.9-36.1 mm) and width of each egg (27.5-28.0 mm) was measured.During the laying season, the eggs were put into incubators. The incubation length varied from 52 to 70 days. After the end of incubation, eggshell mortality and its causes (19.3-52.5%) were examined. In the first year, the viability rate of the incubated eggs was 80.7%; in the second year, 80.5%; and in the third year, 47.8%. Among the unhatched eggs in the first year, 62.5% were unfertilized, 53.1% were infected, 28.1% were dehydrated and 21.9% were found in various stages of embryonic development.

Observation of Hermann’s Tortoise (<italic>Testudo hermanni</italic>) C Lutching without the Presence of Males and Eggshell Mortality on a Large Tortoise Farm in Slovenia Over a Three-Year Period

Veterinary Faculty, Clinic for Reproduction and Large Animals

Faculty of Veterinary Medicine, Department of Animal Hygiene, Behaviour and Welfare

Acta Veterinaria

This work is licensed under the Creative Commons Attribution 4.0 International License.

Observation of Hermann’s Tortoise () C Lutching without the Presence of Males and Eggshell Mortality on a Large Tortoise Farm in Slovenia Over a Three-Year Period

The aim of this study was to determine the percentage of hatched and fertilized eggs in female Hermann’s tortoises before and after the removal of males after...

Observation of Hermann’s Tortoise (Testudo hermanni) C Lutching without the Presence of Males and Eggshell Mortality on a Large Tortoise Farm in Slovenia Over a Three-Year Period

Online veröffentlicht: 31. Dez. 2020

Seitenbereich: 471 - 483

Eingereicht: 14. Nov. 2019

Akzeptiert: 06. Juli 2020

DOI: https://doi.org/10.2478/acve-2020-0035

Schlüsselwörter
breeding, reproduction, incubation, eggshell mortality,

© 2020 Stvarnik Mateja et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Observation of Hermann’s Tortoise (Testudo hermanni) C Lutching without the Presence of Males and Eggshell Mortality on a Large Tortoise Farm in Slovenia Over a Three-Year Period

Online veröffentlicht: 31. Dez. 2020

Seitenbereich: 471 - 483

Eingereicht: 14. Nov. 2019

Akzeptiert: 06. Juli 2020

DOI: https://doi.org/10.2478/acve-2020-0035

Schlüsselwörterbreeding, reproduction, incubation, eggshell mortality,

© 2020 Stvarnik Mateja et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Schlüsselwörter
breeding, reproduction, incubation, eggshell mortality,